instrumental to cool off (lit. & fig.), to get cold to become passionless Snp.235 (nibbanti dhīrā yathâyaṃ padīpo = vijjhāyanti; yathâyaṃ padīpo nibbuto evaṃ nibbanti Kp-a.194, Kp-a.195), Snp.915 (kathaṃ disvā nibbāti bhikkhu = rāgaṃ etc. nibbāpeti Mnd.344); Ja.iv.391 (pāyāsaṃ). See also parinibbāti (e.g. Vb.426).

see nibbuta etym.; influenced in meaning by Sk. nirvāti, nis + vāti to blow, i.e. to make cool, see vāyati & nibbāpeti